Television – Nonpictorial data packet in television format – Data separation or detection
Reexamination Certificate
2006-08-29
2006-08-29
Yenke, Brian P. (Department: 2622)
Television
Nonpictorial data packet in television format
Data separation or detection
C348S470000
Reexamination Certificate
active
07098960
ABSTRACT:
A data slicer300includes a slice level calculation unit310that determines whether a detected digital video signal is a CRI signal on the basis of the amplitude of the signal, and sets a reference slice level and upper and lower slice levels which are obtained by providing offset in the reference slice level, by using only the CRI signal; a data slicing unit160that binarizes a digital video signal S140using the slice levels; a decoding circuit170that converts binarized serial data into parallel data; and a data selection unit320that selects data including no error from the decoded data, and outputs the selected data through a video signal output terminal190. Therefore, even when the video signal is distorted, this data slicer can set appropriate slice level data to binarize the video signal, thereby suppressing the occurrence rate of decoding errors.
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M. Sablatash et al., “Comparisons and Improvements of Design of Data Slicers and Clock Synchronization Circuits for Broadcast Teletext Decoders Operating in a Multipath Environment” IEEE Transactions on Broadcasting, IEE Inc. New York, US, vol. 34, No. 3, Sep. 1, 1988, pp. 381-397.
Kuzumoto Keiichi
Suzuki Akihiro
Matsushita Electric - Industrial Co., Ltd.
Steptoe & Johnson LLP
Yenke Brian P.
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